如果是插件的话,应该将他放在vimfiles\plugin 文件夹下面,如果没有此文件夹,就新建一个。应该就能用了
如果vimfiles不起作用,可以直接放到$VIM/vim73/下相应的文件夹中。
if your user id is :userA,
make below new folder, and copy c.vim into it, others files of c.vim put to ...\vimfiles\
c:\profiles\userA\vimfiles\plugin